Wolf Tooth 1 Degree GeoShift Performance Angle Headset Headset
What the checker says478will not fit
Run variant by variant through the mountain bike builder’s own engine. Every sentence below is the checker’s, unedited. Nothing here says this part fits your bike; it says what it does and does not fit among the parts we hold.
Checked against 6104 verified mountain bike parts in this catalog. 5957 produced no finding of any kind; that is 1 Degree GeoShift Performance Angle Headset (ZS44/ZS56). 1 Degree GeoShift Performance Angle Headset (ZS44/EC49) clears 5871. Each variant produces 178 to 300 distinct errors and 0 distinct warnings.
Will not fit
- Will not fiterror · FrameHeadset lower cup mismatch: Wolf Tooth 1 Degree GeoShift Performance Angle Headset (ZS44/EC49) lower is EC49/40 but Antidote Carbonjack's lower head tube is ZS56 (S.H.I.S.) - cups press in at their exact bore only. On 2 of the 258 verified frames in this catalog. Applies to 1 of 2 variants.
Headset lower, Frame. 217 more findings from the same check, on up to 1 of the 258 verified frames each.
Headset upper, Frame. 138 more findings from the same check, on up to 1 of the 258 verified frames each.
Headset steerer, Fork. 122 more findings from the same check, on up to 1 of the 490 verified forks each.
Open a variant in the builder to see the ones that apply to your own parts.
$114.95 MSRP·92 to 107 g
What the maker states
- Upper
- Assembly ZS44/28.6 (S.H.I.S.)
- Lower
- Assembly EC49/40 (S.H.I.S.) (on 1 of 2 variants); Assembly ZS56/40 (S.H.I.S.) (on 1 of 2 variants)
- Steerer
- Tapered (1.5-1.125)
A value shown as a set or a range differs between this model’s variants and is never one variant’s spec.
2 verified variants
| Variant | Lower | Price (MSRP) | Weight | Source | Last checked | Build |
|---|---|---|---|---|---|---|
| 1 Degree GeoShift Performance Angle Headset (ZS44/ZS56) | assembly ZS56/40 (S.H.I.S.) | $114.95 | 92 g | maker’s page | 2026-08-21 | Build with this |
| 1 Degree GeoShift Performance Angle Headset (ZS44/EC49) | assembly EC49/40 (S.H.I.S.) | $114.95 | 107 g | maker’s page | 2026-08-21 | Build with this |
Source
Source: each variant links the maker’s own page in the table above. Last checked 2026-08-21.
Checked against
The checker ran this model against every verified part below that it has a slot for, the same way it checks a build in the builder. What follows is the verdict it actually produced for that specific pairing — not a recommendation, and not a guarantee any of these parts fits your own bike.
- 5DEV R-SPEC Trail/Enduro Cranks (Crankset) No conflicts found
- 9point8 Fall Line (Dropper Post) No conflicts found
- 9point8 Stout (31.8, 30mm) (Stem) No conflicts found
- ACID SLX 30 front (Front Wheel) No conflicts found
- ACID SLX 30 rear (Rear Wheel) No conflicts found
- Airdrop Edit MX (Frame) Will not fit
6 of 1881 counterparts with a page of their own that the checker actually probed this model against, in alphabetical order by brand and model — never by price, popularity or the verdict itself.